// Copyright (C) 2013 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.

/*---
description: >
    `yield` is a valid statement within generator function bodies.
es6id: 14.4
features: [generators]
---*/

function Test() {
    var iter, result;
    var g1 = function*() { yield; };
    var g2 = function*() { yield 1; };

    iter = g1();
    result = iter.next();
    assert.sameValue(
      result.value, undefined, 'Without right-hand-side: first result `value`'
    );
    assert.sameValue(
      result.done, false, 'Without right-hand-side: first result `done` flag'
    );
    result = iter.next();
    assert.sameValue(
      result.value, undefined, 'Without right-hand-side: second result `value`'
    );
    assert.sameValue(
      result.done, true, 'Without right-hand-eside: second result `done` flag'
    );

    iter = g2();
    result = iter.next();
    assert.sameValue(
      result.value, 1, 'With right-hand-side: first result `value`'
    );
    assert.sameValue(
      result.done, false, 'With right-hand-side: first result `done` flag'
    );
    result = iter.next();
    assert.sameValue(
      result.value, undefined, 'With right-hand-side: second result `value`'
    );
    assert.sameValue(
      result.done, true, 'With right-hand-eside: second result `done` flag'
    );
}

// preheat
const NUMBER_OF_PREHEAT = 1;
for (let i = 0; i < NUMBER_OF_PREHEAT; i++) {
    Test();
}

ArkTools.jitCompileAsync(Test);
assert.sameValue(ArkTools.waitJitCompileFinish(Test), true, '[JIT] JIT disabled.');

// test
const NUMBER_OF_TEST = 1; // or 2
for (let i = 0; i < NUMBER_OF_PREHEAT; i++) {
    Test();
}
